Chemical Process Industries Flashcards
1
Q
Oxidation of SO2 to SO3 is favoured by
A
low temperature and high pressure
2
Q
Gunpowder, which is an explosive comprises of charcoal, sulfur and
A
salt petre
3
Q
Starting raw material for the manufacture of alum is
A
bauxite
4
Q
Salt cake is chemically represented by
A
Na2SO4
5
Q
Which of the following sugars is the sweetest?
A
Fructose
6
Q
Paper pulp produced by kraft/sulphate process is
A
strong fibrous
7
Q
Claude process of gas liquefaction employs
A
adiabatic expansion against a piston or in a turbine
8
Q
The main use of HCl is in the
A
drilling of petroleum wells and pickling of steel sheets
9
Q
The gasification reaction represented by, C + H2O = CO + H2, is a/an __________ reaction
A
endothermic
10
Q
Viscose rayon is chemically
A
regenerated cellulose acetate
11
Q
All enzymes are made of
A
proteins
12
Q
The combustion reaction, C + O2 = CO2, is
A
exothermic
13
Q
Styrene is produced from ethyl benzene by the process of
A
dehydrogenation
14
Q
Gelatine which is a nitrogenous organic protein is obtained by the hydrolysis of
A
callagen
15
Q
The chamber process is
A. preferred over the contact process for producing 98 to 100% H2SO4 and various oleums.
B. non-catalytic and operates only on pyrites.
C. a batch process for directly producing high strength (98 to 100%) H2SO4.
D. none of these.
A
D.
16
Q
Sucrose content in the raw juice extracted from sugar cane is about __________ percent
A
15 - 20
17
Q
Fusel oil is a/an
A
mixture of higher molecular weight alcohols (a by-product obtained during production of alcohol from molasses).
18
Q
Styrene-butadiene-rubber (SBR) as compared to natural rubber has
A. Poorer tensile strength.
B. poorer resistance to oxidation.
C. greater amount of heat build-up under heavy loading.
D. all (a), (b) and (c)
A
D.
19
Q
Co-efficient of thermal expansion of glass is decreased by the addition of __________ during its manufacture
A
ZnO
20
Q
The catalyst used in the manufacture of DDT (from chloral and chlorobenzene) is
A
oleum
21
Q
Haemoglobin is a/an
A
protein
22
Q
Epoxy resin
A
is a good adhesive
23
Q
Concentration of NaOH solution produced by mercury electrolytic cell is about __________ percent
A
50
24
Q
Which of the following is the most adverse factor challenging the choice of mercury electrolytic cell process for the production of caustic soda?
A
Pollution of water stream by mercury
25
Esterification reaction produces
soap
26
Wood charcoal is used for decolouration of sugar, because it __________ the coloured materials
adsorbs
27
Producer gas consists mainly of
CO, CO2 N2, H2
28
Neoprene is the trade name of
polychloroprene
29
Hard water
is not unfit for drinking purpose.
30
Which of the following is an organo-metallic compound?
Tetra-ethyl lead
31
Sulphur addition in soap is done to
cure pimples & dandruff
32
Phosphate rock is a raw material for the manufacture of
phosphoric acid
phosphorous
superphosphates
33
Mineral oils (e.g. petroleum oils) are preferred over fatty oils (e.g. mustard oil, ghee, tallow, palm oil, olive oil etc.) as a lubricant due to its
all (a), (b) and (c)
poor oxidation stability and high gum forming tendency.
greater tendency of decomposition at elevated temperature.
hydrolysis tendency in presence of water.
34
Which of the following is not a raw material used for the manufacture of ordinary glass?
A. Iron oxide
B. Soda ash
C. Limestone
D. Silica
Iron oxide
35
Esterification reaction
all (a), (b) and (c)
produces soap.
is reversible.
is a reaction between an alcohol and an organic acid
36
In sulphate pulp manufacture, the pressure and temperature in the digestor is
10 atm., 170-180°C
37
Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of
sodium chloride (NaCl)
38
Pick out the endothermic reaction out of the following.
C+O2 = CO
CO + 3H2 = CH4 + H2O
CaCO3 = CaO + CO2
CO +O2 = CO2
CaCO3 = CaO + CO2
39
Pasteurisation of milk means
killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics.
40
Fusion of bauxite and __________ produces high alumina cement
limestone
41
__________ process is used for the manufacture of sodium carbonate by ammonia soda process
Solvay
42
Polycaprolactum is commercially known as
nylon-6
43
Frasch process is for
mining sulphur
44
Very fine suspended and colloidal impurities are removed from water by a process called
coagulation
45
Pitch (a product of coal tar distillation) is always mixed with creosote oil, when it is to be burnt in a burner, because
it reduces viscosity and imparts fluidity for its transportation through pipelines at economic pressure drop
46
Which is the main reducing agent during the production of iron from iron ore in a blast furnace?
CO
47
The drug used in contraceptives is
mestranol
48
Raw materials used for producing __________ cement does not contain iron oxide
white
49
In the Lurgi coal gasifier
large quantity of coal can be processed
50
Neon gas is
used in color discharge tube
51
Calgon used in water treatment is chemically
sodium hexametaphosphate
52
Oil preferred for paint manufacture
Drying oil
53
Styrene butadiene rubber (SBR) is
a synthetic polymer
54
Ethylene oxide is produced by oxidation of ethylene in presence of AgO catalyst at
5 atm & 275°C
55
Glycerine is used in the
manufacture of explosive.
conditioning and humidification of tobacco.
manufacture of pharmaceuticals.
56
Cumene is the starting material for the production of
phenol and acetone
57
The type of high refractive index glass used in optical instruments is __________ glass
flint
58
Oxidation of ortho-xylene in presence of __________ catalyst is done to produce phthalic anhydride on commercial scale
vanadium
59
Most commonly used rubber vulcanising agent is
sulphur
60
Terylene is
both (a) & (b)
same as dacron
a polyester
61
Free alkali in toilet soap is __________ that in a laundry shop
less than
62
Dehydrogenation of isopropanol produces
acetone
63
Pick out the wrong statement
Tarnish inhibitor (e.g., benzotriazole) is added in soap to facilitate the removal of stains due to tea, blood etc.
64
Concentration of hydrogen peroxide is done by
vacuum crystallisation
65
Helium is produced on commercial scale from
natural gas
66
Fermentation of molasses to produce ethyl alcohol is done at __________ °C
20 - 30
67
The catalyst used in the manufacture of DDT is
20% oleum
68
Most widely and commonly used coagulant for the removal of suspended impurities in water is
alum
69
__________ is used as a catalyst in fat splitting
ZnO
70
Which of the following is not produced on commercial scale from sea water?
Bromine
Magnesium compounds
Potassium compounds
Sodium sulphat
Sodium sulphate
71
Heating of __________ to 120°C, produces plaster of paris
gypsum
72
Pick out the wrong statement.
Decomposition of sulphuric acid on heating does not start before its boiling.
73
Which of the following has sodium bicarbonate as its main constituent?
Baking powder
74
Ordinary glass is not a/an
material with sharp definite melting point
75
In primitive days, __________ was being manufactured by Leblanc Process
soda ash
76
The only commercial Fischer-Tropsch plant for producing liquid hydrocarbon fuel from coal is located at
SASOL (in South Africa)
77
Lurgi coal gasifier is a pressurized __________ bed reactor
moving
78
Oils are partially hydrogenated (not fully) to manufacture vanaspati, because fully saturated solidified oils
cause cholesterol build up and blood clotting
79
Paper-grade bamboo contains about __________ percent cellulose.
5
80
Carboxymethyl cellulose (CMC) is added in detergents to act as a/an
anti soil redeposition agent
81
Vulcanisation of rubber
converts its plasticity into elasticity
82
Raw materials for 'Solvay Process' for manufacture of the soda ash are
salt, limestone and coke or gas
83
Chloral is used in the manufacture of
DDT
84
Bromine is used in the preparation of
fire extinguishing compounds.
fire proofing agents.
dyes and antiknock compounds.
85
Sudden temperature fluctuation does not affect pyrex glass, because of its
low co-efficient of expansion.
86
The process used for the manufacture of ethyl alcohol from molasses is
none of these
(process is fermentation)
87
Most easily and cheaply available fibrous raw material for paper manufacture available in India is bamboo. The yield of pulp produced from fibrous raw material by mechanical process is about __________ percent.
< 10
88
Absorption of SO3 in 97% H2SO4 is
exothermic
89
__________ process is used for the commercial production of nitric acid by the catalytic oxidation of ammonia.
Ostwald's
90
Sulphuric acid solution having a specific gravity of 1.20 at room temperature is used mainly for the
car battery solution
91
The catalyst used in the production of elemental sulphur from H2S (by oxidation-reduction) is
alumina
92
A good quality coal should have
none of these
93
Zeolite used in water softening process (cation exchange) is regenerated by washing with
brine
94
The catalyst used in shift converter is
nickel
95
Which of the following is a detergent?
Alkyl benzene sulphonate
96
Drinking (potable) water treatment does not involve
softening
97
Phenol formaldehyde resin is used as an adhesive in making
laminates
98
Pick out the correct statement.
A. A fat is converted into oil by its hydrogenation.
B. There is no difference between a fat and an oil so far as its physical properties are concerned.
C. All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms.
D. Vegetable oils are classified as drying, non-drying and semi drying oils depending upon their fatty acids content.
C. All vegetable oils except coconut oil, contains fatty acids having more than sixteen carbon atoms.
99
DDT should not be allowed to come in contact with iron (during its manufacture) to
avoid its decomposition.
100
Catalyst used in the manufacture of sulphuric acid by chamber & contact processes are respectively
oxides of nitrogen & V2O5 on a porous carrier.
101
DDT stands for
dichloro-diphenyl-trichloroethane.
102
Phosphoric acid is prepared from
rock phosphate
103
Metallic soap (e.g. aluminium or calcium salts of fatty acids) can be used
as a lubricant.
104
Which of the following processes does not produce Cl2 as a co-product during the manufacture of caustic soda?
Lime-soda process
105
Bleaching action of bleaching powder is due to its __________ properties.
oxidising
106
Solvent extracted oil
none of these
has low free fatty acid content.
is odourless.
has more of unsaturates.
107
Which of the following is not required in the manufacture of soda ash by Solvay process ?
Nitric acid
108
Saponification number of an oil or fat
all (a), (b) & (c)
gives an idea about its molecular weight.
is inversely proportional to its molecular weight.
detects its adulteration.
109
The purpose of tanning in leather industry is to
stiffen the leather.
110
Lime and soda ash are added to water to remove
bicarbonates & sulphates of calcium and magnesium.
111
Kaoline is a/an
refractory material
112
Hydrogenation of edible vegetable oils
is an exothermic reaction.
increases their melting point.
is done in presence of nickel catalyst.
113
Phenol is mainly used
to produce phenol formaldehyde.
114
Main constituent of dolomite is
MgCO3
115
Conversion of CO to CO2 by steam in presence of a catalyst is called
shift conversion.
